8-segment redundant fieldbus power
system for use with Yokogawa
CENTUM 3000 R3 Control System
F880
♦
Integrated redundant fieldbus
power for ALF111 F
OUNDATION
™
fieldbus™ cards
♦
♦
♦
♦
Low power dissipation
Passive module carrier
On-line diagnostics option
Redundant power & conditioning
♦
♦
High-density, compact design
Fully isolated
The F880 fieldbus power system
is designed
to provide redundant power for eight F
OUNDATION
fieldbus
TM
H1 segments when used with Yokogawa
ALF111 fieldbus cards. The F880 module carrier has
system connectors for direct connection to two
redundant pairs of fieldbus cards using Yokogawa
AKB336 cables. Power for the fieldbus segments is
provided by two F801 power modules operating in
a redundant configuration. Failure alarms, galvanic
isolation, power conditioning and segment
termination are incorporated into each F801
module. In simplex applications, a single F801
module may be used. Termination of the fieldbus
segments is automatically maintained when single or
redundant F801 modules are fitted.
For extreme reliability,
the module carrier has
no components and only provides interconnections
between the power modules and external
connections. It is supported in a rigid metal frame
that protects the circuit board from mechanical
damage. Secure DIN-rail mounting is provided by
integrated fixings.
Each F801 module monitors
the output of the
eight fieldbus segments and indicates an alarm by
means of a built-in, normally closed relay if any of the
segments is shorted or below the minimum output
voltage threshold. Failure of either of the bulk power
input supplies is also annunciated. The alarm contacts
are volt-free and galvanically isolated from other
circuitry. Connections to the alarm relays are made via
terminals on the F880-CA carrier. A separate alarm
module is not required for this function. LED indicators
also show the status of each F801 module and the
eight individual segments. In normal operation, each
segment LED is lit, showing that the segment is
powered. If a segment is shorted, this LED is
extinguished, and the module Alarm LED is lit.
A separate physical layer diagnostics module
may be installed on the carrier to automatically collect
and distribute additional diagnostic information for
each of the eight fieldbus segments.
The F801 module provides galvanic
isolation
between the 24V DC input power and the
fieldbus segments, as recommended by the
IEC61158-2 fieldbus standard and the F
IELDBUS
Foundation™ FF-831 validation test for power
conditioners.There is also galvanic isolation between
the fieldbus segments, thereby preventing multiple
segment failures due to ground faults on more than
one segment. Each segment has its own fieldbus
power conditioner and current limitation.
Redundant 24V DC
(nom.) input power is
connected to the F880 carrier using two-part
pluggable connectors. Field wiring connections are
available with either pluggable screw terminals (F880-
PS) or pluggable spring clamp terminals (F880-PC).
F
OUNDATION
fieldbus
™
is a trademark of Fieldbus Foundation
™
, Austin, Texas.
EUROPE (EMEA)
Tel: +44 (0)1582 723633
Fax: +44 (0)1582 422283
AMERICAS
Tel: +1 603 926 0090
Fax: +1 603 926 1899
ASIA PACIFIC
Tel: +65 487 7887
Fax: +65 487 7997
E-mail: enquiry@mtl-inst.com
Web site: www.mtl-inst.com
Dec 2005
SPECIFICATION
Location of equipment
See Approvals
OUTPUT
Number of channels
Eight
Voltage
21.5V DC minimum
24.0V DC maximum
Design current
0 to 350mA per segment
Current limit
> 370mA
Minimum load
No load
Isolation
Fieldbus to power supply: 250V AC rms withstand
Fieldbus to fieldbus: 250V AC rms withstand
INPUT
Input voltage
19.2 - 30.0V DC, reverse polarity protected
Current consumption
(8 segments each with 350mA output load, redundant operation)
3.5A @ 24V DC input, max.
Power dissipation
(8 segments each with 350mA output load, redundant operation)
2.75W / segment, typ.
ALARMS
Alarm contact rating
1 A max. @ 30V DC max.
Alarm contact status
Normally closed
Alarm threshold
Segment output: 19V DC
MECHANICAL
Mounting method
Integrated fixings for 'Top hat' DIN rail, 35mm x 7.5mm or
35mm x 15mm to EN50022
ELECTRICAL CONNECTIONS
Host connectors
Host 1A, Host 1B, Host 2A, Host 2B via AKB336 cables to
ALF111 modules
Field, Power & Alarm terminals
Pluggable rising cage-clamp screw terminals (-
PS)
Conductor size: 0.14 to 2.5 mm
2
Pluggable spring-clamp screw terminals (-
PC)
Conductor size: 0.2 to 2.5 mm
2
- flexible or rigid
Chassis ground
Fixed rising cage-clamp screw terminals
Conductor size: 0.14 to 2.5 mm
2
Terminators
A single termination is provided automatically by using either 1
or 2 power modules
F880 - Block diagram
Power A
1A
F801
Power
Module
Power conditioning
Alarm
Segment 1
2
Diagnostic module
3
4
5
6
7
Segment 8
Chassis
Ground
Field
Connections
Feb 2006
Host
Connections
1B
2A
Isolation
F801
Power
Module
Power conditioning
2B
Power B
ENVIRONMENTAL
Ambient temperature
Operating
—40°C to +65°C
Storage
—40°C to +85°C
Isolation
(See note)
Note: This temperature range applies only when the carrier DIN rail
is mounted vertically on a vertical surface.
Ingress protection
IP20 to BS EN60529 (Additional protection by means of
enclosure)
ELECTRICAL
EMC Compliance
To EN61326:1998 Electrical equiment for measurement, control
and laboratory use - EMC requirements
PHYSICAL NETWORKS
IEC61158-2
ISA-S50.02 Part 2-1992
F
OUNDATION
fieldbus
TM
H1
Profibus PA
ORDERING INFORMATION
COMPONENTS AND ACCESSORIES
Part No
F880-CA
F801
F880-PS
Description
F880 module carrier, unpopulated
8-segment power module
F880 system, pluggable screw terminal
connectors, comprising F880 carrier and two
F801 modules
F880 system, pluggable spring clamp
connectors, comprising F880 carrier and two
F801 modules
F880-PC
EUROPE (EMEA)
Tel: +44 (0)1582 723633
Fax: +44 (0)1582 422283
AMERICAS
Tel: +1 603 926 0090
Fax: +1 603 926 1899
ASIA PACIFIC
Tel: +65 487 7887
Fax: +65 487 7997
E-mail: enquiry@mtl-inst.com
Web site: www.mtl-inst.com
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